I highly doubt they will test you for mushrooms but even if they catch you I highly doubt they will do anything, at the worst give you a little more time or community service =\ in california where I live they won't test you for anything that you dont have on your record, for example they didnt test me for anything but Meth because thats all they had proof of, doing single chem tests is cheaper and they dont like to do full screens for expendature reasons, good luck anyways